I've just done exactly what you've done. Painted my brembo's blue. Just waiting on stickers. I went for some goodridge phantom braided lines. Your standard lines will be too short on full lock. As for rear brakes, why not go for the leon cupra r ones to match the fronts? The discs are only slightly bigger but theyre vented plus you'll be sticking with an oem bias, albeit for a lcr. No point going too big as your rears only account for about 30% of the total braking effort.